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Title of Journal: J Comp Physiol A

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Abbravation: Journal of Comparative Physiology A

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Springer-Verlag

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DOI

10.1016/0166-1280(89)85086-9

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1432-1351

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Intensity contrast as a crucial cue for butterfly

Authors: Hisaharu Koshitaka Kentaro Arikawa Michiyo Kinoshita
Publish Date: 2011/08/17
Volume: 197, Issue: 11, Pages: 1105-
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Abstract

Papilio butterflies use a tetrachromatic color vision to discriminate a rewarding flower approach land and take nectar from the flower In the course of further analyzing their foraging behavior in a laboratory condition we found that some butterflies could not land on the target flower even they discriminated and tried to land on it especially when the target was dark This phenomenon which we call “landing suppression” indicates that the cue for landing differs from the cue for visually locating a flower We hypothesized that a possible cue for landing was intensity contrast between the target and background and have initiated to test this hypothesis We tested the butterflies’ landing behavior to targets of various colors and intensities presented on background of black or various densities of gray As a result the landing was most strongly suppressed when the intensity contrast was close to zero irrespective of the target colors suggesting that the butterflies used the targetbackground intensity contrast when landing

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